Hot-water furnace.



F. F. TURNER.

HOT WATER fURNACE. APPLICATION FILED novJx, 1915.

1,218,133. 1 Patented Mar. 6, 1917.

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HOT WATER FURNACE.

APPLICATION FILED NOV. 1, I915.

Patented Mar. 6, 1917.

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FRANK FRANCIS TURNER, 0F LITTLE FALLS, MINNESOTA.

HOT-WATER FURNACE.

Specification of Letters Patent.

Patented Mar. e, 1917.

Application filed November 1, 1915. Serial No. 59,094.

To all whom it may concern:

Be it known that I, FRANK F. TURNER, a. citizen of the United States, residing at Little'Falls, in the county of Morrison and State of Minnesota, have invented certain new and useful-Improvements in HotJVater Furnaces, of which the following is a specification, reference being had to the accompanying drawings. v

This invention relates to certain improvements in hot water furnaces and has for its primary object to provide means whereby the water may be heated to a high degree in its passage through the several water chambers of the furnace, with the consumption of a minimum amount of fuel.

The invention has for. another of its objects to provide a furnace'of the above type having a multiplicity of superposed water chambers and fire flues alternately disposed with respect to the chambers and extending the entire length thereof.

It is an additionalobject of the invention to provide means for discharging the smoke and products of combustion'directly from the grate into the chimney flue when it is desired to clean the walls of the water chambers.

It is still another object of the invention to provide a hot water furnace which is simple and economical in its construction and may be advantageously employed as a low pressure steam generator.

With the above andother objects in view, my invention consistsin the novel features of construction, combination and arrangement of parts to behereinafter more fully described, claimed and illustrated in the accompanying drawing, in which,

Figure 1 is a vertical sectional view of a hot water furnace, illustrating the preferred embodiment of the invention;

Fig. 2 is a transverse vertical section;

Fig. 3 is a section taken on the line 33 of Fig. 1; and

Fig. 4 is a perspective view of one of the water chamber sections.

Referring in detail to the drawings, 5 designates the base of the furnace which is provided in its top surface, adjacent to its marginal edge, with a continuous groove or channel 6. In this channel, the lower edges of the shell or casing 7 of the furnace are seated and may be tightly secured therein The front wall of the furnace shell is provided with relation to the channel 6, and between the side walls of the ash pit the grate 13 is arranged. This grate may either be of the fixed or rocking type, but preferably the latter, and any preferred means may be provided for operatingthe grate sections.

Immediately above the grate, the main water chamber let is arranged, said chamher being of-inverted U-shape form in crosssection and the side and top walls thereof having intercommunicating water spaces 15. Above this main water chamber, the additional chamber sections 16 are arranged in superposed relation, said additional chambers being of somewhat less height than the main chamber 14. The top wall of this chamber 14 is cutaway or terminates short of the corresponding ends of the side walls of said chamber, as shown at 17, and the relatively opposite ends of the other water chambers 16 are alsosimilarly. cut away or recessed, as at 18; To the forward ends of the several water chambers, the vertical wall 19 is secured, saidwa-ll being provided with openings indicated at 20,- which afl'ord access to the fire passages between the several water chambers, to the fire box and to the ash pit. Avertical wall 21 is also secured to the rear ends of the several waterchambers, and at its upper end this -.wall is recessed or cutaway, as at 22, tov a depth equal to the height of the uppermost water chamber 16.

The side walls of the several water chambers are connected by spaced water conduits 23 which affordcommunication between the water spaces of the adjacent chambers. The space between the upper portions of the several superposed water chambers provides passages, indicated at 24., for the heat and products of combustion, the alternate passages communicating with the intermediate passage at opposite ends of the furnace.

There will thus be a travel of the smoke and a the superposed chambers 16 to the chimney flue. It will be observed that the walls of the water chambers are spaced from the corresponding walls of the outer furnace shell 7, and the air in this space also becomes highly heated, thereby preventing chilling of the exterior walls of. the several water chambers.

To the upper portion of the uppermost chamber 16 at its approximate center, the hot water outlet pipe 25 is connected, and to each side of the main water chamber 1% a return pipe 26 is connected, said pipes leading in through the shell or casing 7, as will be readily understood. 27 designates the top plate of the furnace shell which is securely fixed upon'the upper edges of the walls of said shell or casing and is provided with an opening to accommodate the pipe This top plate 27 also has an opening therein at its rear end in communication with the smoke'passage or outlet at the rear end of the furnace, and to the same a pipe leading to the chimney fine is adapted to be connected.

The rear wall 21 is provided with a plurality of spaced openings which are in communication with the firebox of'the furnace, and a valve plate 28 is mounted upon the wall 21 in suitable guides 29 for sliding movement over these openings. This plate may be actuated by a bar or'rod, indicated at 30, which is'connected thereto, and eX- tends laterally from the plate and through an opening provided in one of the side walls of'the shell or casing 7. The plate 28 is adapted to be moved over the openings in the Wall 21. Thus, the smoke and products of combustionmay either be admitted directly from the firebox into the outlet flue, or such communication cut off and the products of combustion caused to travel through the passages 24 in the manner above stated.

From the foregoing description, taken in connection with the accompanying drawings, the construction and manner of operation of the invention will be clearly and fully understood. The cold water enters the water space in the main chamber 14: through the return pipes which are connected to the radiators, and this water is first heated very quickly in this chamber by contact with the highly heated walls thereof. The heated water rises through the water legs 23 to the next Water chamber 16, and finally from this chamber into the uppermost chamber 16. The walls of these chambers are, of course, very highly heated by the passage of the products of combustion upwardly between the same so that the temperature of the water will be increased toa very high degree when it leaves the uppermost chamber -16 and enters the outlet pipe 25 which carries the Water to the radiators in the buildmg. The circulation of the water in this manner 1s continuous, and'as the passages 2-4 for the smoke and products of combustion extend throughout the length of the furnace, it Will be manifest that every portion of the inner walls of the chamber sections will transmit heat to the water in its passage through the several water spaces. It is thus apparent that the furnace may be economically operated, and the water heated to a high temperature with a consumption of a relatively small amount of fuel. Upon the opposite sides of the water chambers and the ash pit, the plates 32 are secured having openings to accommodate the return pipes and the water conduits. Over the latter openings, the cover plates 33 are arranged and secured 'by means of suitable fastening screws to theface of the plate 32.

In, addition to the use of the invention as a water heater for the purpose of supplying hot water in heating systems, thefurnace can also be advantageously used as a low pressure steam generator if desired, as will be manifest from the foregoing description.

WVhen it is necessary to clean the walls of the several water chambers defining the passages 25 for the smoke and products of co111- bustion, the sliding valve plate 28 is moved to its open position so that the smoke will enter directly into the vertical flue or passage at the rear of the furnace and be conducted to the chimney fine and not travel through the passages 24:. Thus, the walls of these passages may be scraped or otherwise cleaned through the clean-out door in the front wall of the furnace shell, and the operator will suffer no inconvenience due to smoke issuing from said passages.

In practice, it will be obvious that any desired number of the superposed water chambers may be employed, in accordance with the desired heating capacity of the furnace. I also reserve the privilege of adopting various modifications in the form, proportion and arrangement of the several structural features of the furnace, as may be fairly embodied within the spirit and scope of the invention as claimed.

Having thus fully described my invention, what I desire to claim and secure by Letters Patent is The combination with a furnace body including front and rear walls, a rear vertical outlet flue and olean-out openings in the front wall, of a vertical tier of superposed water chambers of inverted U-shaped form the side walls of which are unconnected at their ends and abut against the front and rear walls of the furnace body, conduits connecting each of the side, walls of adjacent .water chambers to eachother at their opposite ends, the top walls of adjacent chambers being cut away at their relatively opposite ends between the side walls of thee-chamber to afiord communication between the longi tudinal "fines for the products of combustion,

the rear Wall of the furnace body being proflue and said outlet fine, and means for outvided' in its upper end with an opening afting ofl or establishing such communication fording communication between the cutwith the outlet flue.

away portion of the uppermost Water cham- In testimony whereof I hereunto aflix my 5 ber and the outlet flue, said wall being also signature in the presence of two witnesses. 15

provided with a series of vertically disposed FRANK FRANCIS TURNER openings extending above and below the horizontal wall of the lower water chamber Witnesses:

and afi'ording communication between the J. W. GRossFInLD, 10 fire box and the next adjacent longitudinal C. F. HoLs'r.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

